In 2007, back when the nation was swept with the 'Ivy Syndrome,' a scandal between Ivy and Heechul broke out, claiming that the two had a romantic relationship. Both parties denied the dating rumors and the scandal eventually dwindled down over time.

The sexy singer revealed on the radio show, "After that scandal, I was still able to remain good friends with Heechul. However, when a different scandal about me arose, he suddenly stopped contacting me. I tried calling him, but another girl picked up the phone."

Later, she discovered that Heechul changed his phone number without her knowledge. "It was really mean," Ivy expressed sarcastically. "I bumped into him during a broadcasting recently and I jokingly said to him, 'Heechul, watch your back.'"

Netizens commented:
"Ivy must be very lonely..."
"Can't she take a hint?"
"When I looked at the picture on the right, I thought, 'Wow, Ivy came out pretty good,' and then I realized... it was Heechul... kekeke"